- unused variable THD::con_root removed
- we don't need to bzero(&warn_root) just before init_alloc_root(&warn_root)
- we don't need to bzero(&transaction.mem_root) because we 
  bzero(&transaction) later in THD::THD
- we don't need to free thd->mem_root thd->transaction.mem_root
  in handle_one_connection because they are freed in THD::~THD
  which is called in end_thread later 

into mysql.com:/home/kostja/mysql/mysql-5.0-root

for some items, which made aggregates like MIN(), MAX() and SUM() fail.

- dropped routines should not show up in status
- error handling for non-existing routines

+ some cleanup.

into bar.mysql.r18.ru:/usr/home/bar/mysql-4.1

  There were errors in cp850: in unicode, ctype and sort arrays

Fixed various bugs: setting local variables to NULL, SELECT INTO var now actually
might work, SELECT INTO with not row now gives a "no data" warning (instead of
the "empty query" error), etc.
Updated test cases accordingly.

into mysql.com:/space/my/mysql-4.1

into sanja.is.com.ua:/home/bell/mysql/bk/mysql-4.1

into mysql.com:/space/my/mysql-4.1

into mysql.com:/bk/mysql-4.1

into sanja.is.com.ua:/home/bell/mysql/bk/work-used_tables-4.1

into mysql.com:/space/my/mysql-4.1

into sanja.is.com.ua:/home/bell/mysql/bk/work-used_tables-4.1

into sanja.is.com.ua:/home/bell/mysql/bk/work-delete-4.1

into sanja.is.com.ua:/home/bell/mysql/bk/work-delete-4.1

into sanja.is.com.ua:/home/bell/mysql/bk/work-used_tables-4.1

   as this is a document that belongs to the mysqldoc tree, it needs to
   be copied over manually (using the Bootstrap script), before doing an
   official release distribution. The file Docs/internals.texi in this tree
   is only a dummy file to keep "make dist" happy.

into mashka.mysql.fi:/home/my/mysql-4.1

New multi-key-cache handling. This was needed becasue the old one didn't work reliable with MERGE tables.
ALTER TABLE table_name ... CHARACTER SET  ... now changes all char/varchar/text columns to the given character set
(One must use ALTER TABLE ... DEFAULT CHARACTER SET ... to change the default character set)
Fixed that have_compress is detected properly (fixes problems with func_compress.test on platforms without zlib)
New syntax for CACHE INDEX ('keys' is optional if no index name is given and one mentions the key cache name only ones)
Removed compiler warnings
Added mysql_set_server_option() to allow clients like PHP to easaily set/reset the multi-statement flag.

into serg.mylan:/usr/home/serg/Abk/mysql-4.1

into gluh.mysql.r18.ru:/home/gluh/mysql-5.0.sp